According to defense attorney Doug Peters, " This case has never been about what happened."

"What is important here is that, at the time of the shooting, that Mr. Neuman, because of his mental illness, did not understand the difference between right and wrong."

The lawyers believe the insanity plea now shifts the burden of guilt to the prosecution. When pressed about Mr. Neuman's current mental state, his lawyers stated those details will be withheld until the trial begins on October 17.

"He is concerned. He is obviously in a bad position right now, in terms of fearful for what is going to happen."

When asked about a possible change of venue for Neumans upcoming trial, his lawyers said they will not seek one and expressed confidence in their ability to obtain a fair trial. They intend to call a number of medical experts to testify about Neuman's mental state.

Neuman was an employee of GE Energy in Atlanta, where he supervised the victim's wife, Andrea Sneiderman.